net: libwx: fix multicast packets received count

Jiawen Wu · kuba-moo · commit 2b30a3d1ec25 · 2025-07-15T17:29:54.000-07:00
Multicast good packets received by PF rings that pass ethternet MAC address filtering are counted for rtnl_link_stats64.multicast. The counter is not cleared on read. Fix the duplicate counting on updating statistics. Fixes: 46b92e1 ("net: libwx: support hardware statistics") Cc: stable@vger.kernel.org Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/DA229A4F58B70E51+20250714015656.91772-1-jiawenwu@trustnetic.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -2777,6 +2777,8 @@ void wx_update_stats(struct wx *wx)
 		hwstats->fdirmiss += rd32(wx, WX_RDB_FDIR_MISS);
 	}
 
+	/* qmprc is not cleared on read, manual reset it */
+	hwstats->qmprc = 0;
 	for (i = wx->num_vfs * wx->num_rx_queues_per_pool;
 	     i < wx->mac.max_rx_queues; i++)
 		hwstats->qmprc += rd32(wx, WX_PX_MPRC(i));

Original file line number	Diff line number	Diff line change
`@@ -2777,6 +2777,8 @@ void wx_update_stats(struct wx *wx)`
`2777`	`2777`	`hwstats->fdirmiss += rd32(wx, WX_RDB_FDIR_MISS);`
`2778`	`2778`	`}`
`2779`	`2779`
	`2780`	`+ /* qmprc is not cleared on read, manual reset it */`
	`2781`	`+ hwstats->qmprc = 0;`
`2780`	`2782`	`for (i = wx->num_vfs * wx->num_rx_queues_per_pool;`
`2781`	`2783`	`i < wx->mac.max_rx_queues; i++)`
`2782`	`2784`	`hwstats->qmprc += rd32(wx, WX_PX_MPRC(i));`